I removed a toilet to put ceramic tile down. All around the ousitde of the flange and wax ring were ant hill mounds of sand. I want to self level the floor but the flange is in the lowest spot of the room and is surrounded by sand and concrete. What is the best way to raise the flange to my desired level? I have a picture but could not figure out how to
Attach it to this question.

How low is the flange? You have some "wiggle room" in setting the bowl.

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How do I add pictures and other file types to my post?
A. "Attach" files (including pictures) from your computer. This method puts the attached file below the text of the post.
Click on an Ask or Answer button to ask or answer a question
Compose your question or answer in the window.
Under the window where you composed your question or answer is a section called Additional Options.
Click on the Manage Attachments button: a pop-up dialog will open. NOTE: The Manage Attachments dialog lists the maximum sizes of the various types of files that may be attached.
Click the Browse button to navigate to the image on your computer and double click the file on your computer: this will return you to the dialog window.
Click the Upload button.
Click the link to close the dialog window OR repeat numbers 5 & 6 to attach another image.
B. "Embed" image(s) from the internet. This method inserts an image wherever you wish within the text of your post.
Click the Insert Image icon above the posting window: A pop-up asking for the URL will open.
Enter the URL of the image in the field then click the OK button.
Gooduck, tom

Here is a picture of the flange, it is in there good. Should I cut off the bolts and put a repair flange on top of it?